ZAGREB: Fifth-seeded Martin Klizan of Slovakia came back from a set and a break down to beat Italian lucky-loser Matteo Viola 4-6, 7-6 (6), 6-1 Tuesday in the first round of the Zagreb Indoors.

After winning the first set, Viola led 3-2 in the second when Klizan broke back. Klizan later wasted two set points before winning the set in a tiebreak.

Somdev Devvarman of India also came back from a set and a break down to defeat two-time Zagreb finalist Michael Berrer, who retired because of fatigue when trailing 0-6, 7-6 (6), 4-1.

Also, Igor Sijsling of the Netherlands defeated Nikola Mektic of Croatia 6-4, 6-2 and Philipp Petzschner of Germany beat Mate Pavic of Croatia 7-5, 6-2.

Meanwhile Brazilian doubles specialist Marcelo Melo has accused World No.16 John Isner of “unprofessionalism” after the United States defeated Brazil 3-2 in a tense Davis Cup first round tie in Jacksonville, United States.

Isner, who lost his reverse singles match Sunday to Brazil’s Thomaz Bellucci 6-2, 4-6, 7-6, 4-6, 3-6, complained during and after the match of the opposition fans’ vocal support and use of a tambourine, Xinhua reports.

“Isner should stop crying. Our fans did nothing untoward and supported us like any other fans would,” Melo wrote on Twitter Monday.